mirror of
https://github.com/freebsd/freebsd-src.git
synced 2026-10-28 11:25:21 +01:00
Kyle Evans
7e70589b1b
INT_MAX is already larger than a reasonable hostname might be, but size_t makes some of this easier to reason about as we do arithmetic with it. This would maybe not be worth it if we had to bump the soversion because of it, but libutil does symbol versioning now so we can provide a compat shim. While we're here, fix some inconsistencies in argument names in the manpage. Reviewed by: des Obtained from: https://github.com/apple-oss-distributions/libutil Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D54622
87 lines
2.7 KiB
Plaintext
87 lines
2.7 KiB
Plaintext
.\" Copyright (c) 1999 Brian Somers <[email protected]>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.Dd March 3, 2026
|
|
.Dt TRIMDOMAIN 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm trimdomain
|
|
.Nd "trim the current domain name from a host name"
|
|
.Sh LIBRARY
|
|
.Lb libutil
|
|
.Sh SYNOPSIS
|
|
.In sys/types.h
|
|
.In libutil.h
|
|
.Ft void
|
|
.Fn trimdomain "char *fullhost" "size_t hostsize"
|
|
.Sh DESCRIPTION
|
|
The function
|
|
.Fn trimdomain
|
|
removes the current domain name from the passed
|
|
.Ar fullhost
|
|
name by writing a
|
|
.Dv NUL
|
|
character over the first period of the passed name.
|
|
The current domain
|
|
name is determined by calling
|
|
.Xr gethostname 3
|
|
and removing everything up to the first period.
|
|
The name is determined
|
|
the first time this function is called and is cached for future use.
|
|
.Pp
|
|
The
|
|
.Fn trimdomain
|
|
function will only trim the domain name if the passed
|
|
.Ar fullhost
|
|
ends with the current domain name and if the length of the resulting host
|
|
name does not exceed
|
|
.Ar hostsize .
|
|
.Pp
|
|
If the passed
|
|
.Ar fullhost
|
|
is actually an X11
|
|
.Ev DISPLAY
|
|
specification of the form
|
|
.Sm off
|
|
.Ar host . Ar domain : Ar display Op . screen ,
|
|
.Sm on
|
|
and the domain name is the same as the local domain name,
|
|
.Fn trimdomain
|
|
will remove the embedded domain name, copying the screen and display
|
|
numbers to the end of the base host name and resulting in
|
|
.Sm off
|
|
.Ar host : display Op . Ar screen .
|
|
.Sm on
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn trimdomain
|
|
function does not return a value.
|
|
.Sh SEE ALSO
|
|
.Xr gethostname 3
|
|
.Sh HISTORY
|
|
The function
|
|
.Fn trimdomain
|
|
first appeared in
|
|
.Fx 3.2 .
|